Device for securing printing-plates.



E. E. NOVOTNY. DEVICE-FOR SECURING PRINTING PLATES.

APPLxc'ATIoN FILED' MAY`20, |916. y

Lg@ Patented @Qn-29, 19m

Snom/Hoz entre sanas raiser orrori.

EMIL E.v Novo'rEY, or RIVERSIDE, ILLINOIS, Assrelvon 'ro a. sroGnELLsroKEs, or' MoonEs'rown, NEW JERSEY.

DEVICE FOR SECURINGr PRINTNG-PLATES.

ASpecification of Letters Patent.

Patented @et 29, 1918.

Application filed May 20, 1916. Serial No. 98,912.

T0 all whom t may concern:

Be it known that I, EMIL E. NovorNY, a citizen of the United States,residing at Riverside, in'the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Devicesfor SecuringPrinting-Plates, of which the following is a specification.

This 'invention .rela-tes to certain novel and useful improvements indevices for fastening or securing printing plates in a proper positionof registration on the printing press, the invention being adapted foruse in connection with. either flat or lcurved printing plates. Wherelthe invention is employed in connection with the flat'printing plates ofa platen press, a separate saddle or base plate is used in conjunctiontherewith, but where my fastening device is used on a rotary or cylinderpress, it can be applied directly to the cylinder of such press, thatis, without the interposition of a Vseparate saddle or base plate, `ifdesired.

In carrying out my invention it is my purpose to provide a printingplate securing device through the agency of which the printing plate maybe readily, quickly, conveniently and firmly secured to and removed fromprinting position on the press. Furthermore, in the present instance,Ihave shown my invention as employed in connection with printing platesprovided with small bosses or projections formed on" the under sidethereof and with which bosses or projections, certain locking orlatching members, are adapted to co-act to insure th fastening of tleplate.

Such an' embodiment of the invention will enable the plateto be quicklyand ac' curately adjusted? or registered in the proper field on thepress, for as the dimensions or distances between the boss centers arefixed and determined, the positioning and seeming' of the plate on thepress 'simply requires that the plate be properly registered with theportion of the press by which it is carried andt-hen locked in suchregistered position.

It is also my purpose to dispense with the use of securing screws, boltsand the like, which require time to manipulate in fastening andunfastening the plate, as with my invention a plate may be locked andunlocked on the press with av Vminimum expenditure of time and labor.vMy invention also facilitates any make ready process which may berequired, because of the ease with which the plate can be fastened andunfastened, and will also enable me to dispense with the use of registerblock and groove devices, register hooks and the like. l also aim toprovide a device of this character which will embody the desiredfeatures of simplicity and eiiiciency and which may be readily adaptedto any of the well 'known types of printing presses.

`With the above recited objects and others of a similarnature in view,my invention consists in the construction, combination and arrangementof parts set forth in and falling within the scope of the appendedclaims. l y

In the accompanying drawingsg Figure 1 is 'a cross sectional View takenthrough a portion of ya plate carrying cylinder of a printing press andshowing a plate secured thereto by means of my inn vention.

Fig. 2 is a longitudinal sectional view of thesame on the line 2 2 ofFig. 1.

Fig. 3 is va detail perspective view showing the construction andarrangement of the bosses on the back of the curved printing plate.

Fig. 4 is a perspective view of one of the locking bars.

Fig. 5 is aj transverse sectional view taken through [a fiat printingplate and showing it secured to a flat saddle by means of my invention.

Fig. 6 is a; longitudinal sectional view taken onthe line 6-6 of Fig.5.'

. Fig. '7 is a perspective "iewv of a portion ofthe lsaddle or basesupport for the plate partly taken away and showing one of the lockingbars therein.

I will first describe the invention in its application to a curved plateadapted to be fastened on a cylinder, such embodiment of the inventionbeing shown in Figs. l to 4,' inclusive Formed in the outer face ofthecylinder,

titi

icc

in alinement with each channel, is a row of sockets 1a spacedpredetermined distances apart, say two inches, the spacing of thesockets being uniform with the spacing of the plate bosses,. hereinafterdescribed. These sockets open into the channels, so that the platebosses when inserted in the sockets may be engaged and inter-locked bythe cams or locking members on the sliding locking bars 2.

.Within each channel 1 is housed one of these sliding locking bars 2, ofany suitable material, said bar being preferably yof the same length asthe cylinder. Each bar is provided with an angular head 3 which limitsthe 'sliding movement of the bar by striking against the ends of thechannel. Each bar is also provided with a toothed or rack face 4 withwhich is adapted to engage the pivoted pawl 5 carried by the top Wall ofthe channel to normally prevent the backward travel of the rack bar.However, a pin 6 may be attached to the pawl and al lowed to projectthrough a bore 7, near one end of the cylinder, to permit the pawl to bedisengaged from the rack to allow the backward shifting of the latter.Each bar is also constructed with a row of wedge-shaped or cam-likelocking projections 8 extending therefrom, there being any suitablenumber of such bosses, and these locking projections are spaced toproperly interlock with the spaced bosses 9 on the back or underside ofthe printing plate B. As stated, these bos/ses are preterably spacedpredetermined distances apart, for example, two inches from the centerof one boss to the center of any adjacent boss. Each boss is shaped, inany suitable manner, as by grooving, as at 10, or otherwise to enablethe boss to interlock with the bar, in the present instance with theadjacent projection 8, of the bar.

In the practice of the invention the plate B is placed on the cylinderso that the bosses on thejback of the plate register with and tit intoselected sockets 1, the groove in each boss being exposed to the channel1 so `that the locking bar in the channel may be shifted to bring one ofits cams or locking projections into wedging engagement With,the boss.0f course, when the plate is thus applied each row of -its bosses willhe simultaneously interlocked with the adjacent bar by shlftin thelatter, as will be readily understood, terack and paWl preventing theaccidental unlocking of the bar by the reverse movement of the, latter.To

. unlock the plate it is only necessary to disengage the pawls from therack bars and slidel the latter in the lreverse direction to thatfollowed in the locking operation.

In Fi s. 5 to 7 inclusive, I have shown a modi ed form of the inventionwherein it is adapted to fastening flat plates. In this form of theinvention the printing plate Leaaeaa E is provided with spaced bosses11, in this ca'sealso having grooves 12 therein adapted to receive the'locking projections or parts 13 of the bars 14. However, in this casethese bars 14 slide in channels 15 in a saddle or base F which isadapted to be mounted on the flat printing bed of a printing press, saidsaddle having spaced sockets 1G which open into the channels 15, asdescribed for the cylinder press. The operation of this form of theinvention is similar to that described for the cylinder press.

I have herein shown and described eertain details of construction as tothe lockings bars, bosses, and other parts, but I wish it to beunderstood that this is merely by way of illustration as variousmodiica` tions and changes can be made in such respects withoutdeparting from the spirit of the invention or exceeding the scope of theclaims.

What I claim is:

1. rll`he combination With a printing plate support, of a printing platehaving means at the back facethereof for registering the plate invarious predetermined positionsor locations on the support and meanson-the support for engaging with the registering means on the plate tohold said plate in any selected registeredposition on the support.

2. The combination with a plate having a projection at the-back thereof,of a slidijng locking bar adapted to interlock with the projection ofthe plate to hold the latter in any selected and predetermined position,and means for holding the bar in a locked position.

3i The combination with a printing plate having a series of spacedlocking bosses formed on the back face thereof. of a support for saidplate having a series of sliding locking bars adapted toengage with 'thebosses of the plate to lock such plate on the support and means forholding each locking bar in locked position.

4. The combination with a printing plate` having a series of spacedlocking bosses formed on the back face thereof, each of said bosseshaving a groove therein, of a support for said plate having a series ofsliding locking bars adapted to seat in the grooves of the bo'sses ofthe late to lock such plate on the support, an a pawl and ratchetdevice4 for each of said bars for holding the'bar in locked position.

5. ,The combination of a printing plate havin a spaced locking boss onthe back face iihereof, said boss having a groove therein, of asupportfor said plate having a slot therein, a locking har sliding insaid slot and having a Jortion adapted to seat in the groove of tileboss of the plate to lock such plate on the support. and means forholding the locking bar in locked position.

6. The combination With a printing plate support having a series ofrofws of uniformly spaced sockets formed therein, of a printing plateHaving a series of rows of projections spaced correspondingly to therows of sockets and adapted to fit therein, and means extending throughsaid sockets and engaging the projections for fasteningthe plate t0 thesnp'port.

7. A printing plate having a series of rows of spaced projections formedon the under face thereof, each of said projections having a sockettherein to receive a fastening device whereby said plate may be securedto a support.

8. The combination Iwith a saddle adapted to be attached to a printingpress, of a printing plate adapted to be attached to the saddle, andmeans, including equi-distant uniformly spaced complementary depressionsand projections for insuring the selective fitting of the plate on thesaddle.

In testimony whereof I aiX my sio'nature.

EMIL n. NovoiNY.

